MAX17085B

19-5135; Rev 0; 1/10 www.DataSheet4U.com TION KIT EVALUA BLE IL AVA A Integrated Charger, Dual Main Step-Down Controllers, and Dual LDO Regulators General Description The MAX17085B is an all-in-one notebook power solution integrating a multichemistry battery charger, dual fixedoutput Quick-PWMK step-down controllers, and dual keep-alive linear regulators: Charger: The high-frequency (~1.4MHz) multichemistry battery charger uses a current-mode, fixed inductor current ripple architecture that significantly reduces component size and cost. Low-offset sense amplifiers allow the use of low-value sense resistors for charging and input current limit. The charger uses n-channel switching MOSFETs. Adjustable charge current, charge voltage, and cell selection allow for flexible use with different battery packs. Charge current is set by an analog control input, or a PWM input. High-accuracy current-sense amplifiers provide fast cycle-by-cycle current-mode control to protect against short circuits to the battery and respond quickly to system load transients. Additionally, the charger provides a high-accuracy analog output that is proportional to the adapter current. An integrated charge pump controls an n-channel adapter selector switch. The charge pump remains active even when the charger is off. When the adapter is absent, a p-channel MOSFET selects the battery. Main SMPS: The dual Quick-PWM step-down controllers with synchronous rectification generate the 5V and 3.3V main power i...